Submission #947291

#	Time	Username	Problem	Language	Result	Execution time	Memory
947291		SuPythony	Bliskost (COI23_bliskost)	C++17	57 / 100	1046 ms	20272 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
int main() {
    int n,q; cin>>n>>q;
    string a,b; cin>>a>>b;
    vector<ll> va(n+1,0), vb(n+1,0);
    ll sa=0, sb=0;
    for (int i=1; i<=n; i++) {
        if (n%2==i%2) {
            va[i]=a[i-1]-'a'+1;
            vb[i]=b[i-1]-'a'+1;
        } else {
            va[i]=-(a[i-1]-'a'+1);
            vb[i]=-(b[i-1]-'a'+1);
        }
        sa+=va[i];
        sb+=vb[i];
    }
    if ((sa-sb)%26==0) cout<<"da\n";
    else cout<<"ne\n";
    while (q--) {
        int p; char c; cin>>p>>c;
        int a=c-'a'+1;
        sa-=va[p];
        if (n%2==p%2) va[p]=a;
        else va[p]=-a;
        sa+=va[p];
        if ((sa-sb)%26==0) cout<<"da\n";
        else cout<<"ne\n";
    }
    return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 17 / 17
• Subtask 6: 0 / 43